| 2021年2月13日日本福岛Mj7.3级地震潜在破坏区快速估计 |
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| 引用本文： | 汪源,宋晋东,李山有.2021年2月13日日本福岛Mj7.3级地震潜在破坏区快速估计[J].世界地震工程,2021,0(2):090-97. |
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| 作者姓名： | 汪源 宋晋东 李山有 |
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| 作者单位： | 中国地震局工程力学研究所, 中国地震局地震工程与工程振动重点实验室, 黑龙江 哈尔滨 150080 |
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| 摘 要： | 基于2021年2月13日日本福岛Mj7.3级地震加速度记录，离线模拟了阈值预警方法在此次地震中快速估计潜在破坏区的表现。结果显示，该方法能够在台站P波触发后3s就快速对台站及其周边区域进行地震破坏性判断，同时估计的潜在破坏区域也基本与美国地质调查局（USGS） ShakeMap震后实测VII度以上区域吻合，展示了该方法在此次地震中运用的可行性；然而该方法没有对处在震后实测VII度以上区域内的宫城县南部沿海以及福岛县小部分东北区域给出准确的潜在破坏区判断，这一估计偏差为该方法的适应性研究以及下一步优化提供了参考。
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| 关 键 词： | 潜在破坏区 地震预警 阈值预警 警报级别 |
Rapid estimation of potential damage zone for the Mj7.3 Fukushima earthquake in Japan on February 13, 2021 |
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| WANG Yuan,SONG Jindong,LI Shanyou.Rapid estimation of potential damage zone for the Mj7.3 Fukushima earthquake in Japan on February 13, 2021[J].World Information On Earthquake Engineering,2021,0(2):090-97. |
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| Authors: | WANG Yuan SONG Jindong LI Shanyou |
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| Affiliation: | Institute of Engineering Mechanics, China Earthquake Administration; Key Laboratory of Earthquake Engineering and Engineering Vibration of China Earthquake Administration, Harbin 150080,China |
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| Abstract: | Based on the acceleration records of the Mj7.3 earthquake in Fukushima, Japan on February 13, 2021, this paper simulated the performance of the threshold-based earthquake early warning method in quickly estimating the potential damage area. The results show that this method can quickly determine the seismic destructiveness of the station and its surrounding area within 3s after the station’s P wave is triggered. Meanwhile, the estimated potential damage area is basically the same as the area that USGS ShakeMap MMI>VII, showing the feasibility of the method used in this earthquake; but this method fails to give an accurate judgement of the potential damage area for the coastal area of Miyagi and the northeastern region of Fukushima in the area that USGS ShakeMap MMI>VII, which provides a reference for the adaptive research and improvements of this method. |
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| Keywords: | potential damage zone earthquake early warning threshold-based earthquake early warning alert level |
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